Alpha and Omega Semiconductor
AOSL · NASDAQ
$23.03+$0.43 (+1.90%)TodayMarket closed ·
Prev close $22.60
Who owns AOSL
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 48.6% of AOSL’s shares.
- BlackRock Institutional Trust Company, N.A.12.4%
- State Street Investment Management (US)7.8%
- Manulife Investment Management (North America) Limited4.6%
- Dimensional Fund Advisors, L.P.4.5%
- Next 6 largest institutions19.3%
- All other shareholders51.4%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 3.72M | 12.41% |
| State Street Investment Management (US) | 2.35M | 7.84% |
| Manulife Investment Management (North America) Limited | 1.38M | 4.59% |
| Dimensional Fund Advisors, L.P. | 1.34M | 4.46% |
| Chang (Mike F) | 1.19M | 3.97% |
| Vanguard Portfolio Management, LLC | 1.11M | 3.71% |
| Vanguard Capital Management, LLC | 1.07M | 3.58% |
| Two Sigma Investments, LP | 951.58K | 3.18% |
| Fidelity Management & Research Company LLC | 791.72K | 2.65% |
| Geode Capital Management, L.L.C. | 658.90K | 2.20% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Small-Cap ETF | 1.51M | 5.05% |
| State Street SPDR S&P Semiconductor ETF | 1.34M | 4.49% |
| Vanguard Total Stock Market Index Fund | 759.08K | 2.54% |
| iShares Russell 2000 ETF | 646.13K | 2.16% |
| Vanguard Information Technology Index Fund | 641.70K | 2.14% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $623.33K (5 trades) of AOSL on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Chang Stephen Chunping | Gift | 100.95K | — |
| Chang Mike F | Gift | 100.95K | — |
| Chang Mike F | Gift | 3.00M | — |
| Chien Joshua C. | Award | 1.37K | — |
| Xue Bing | Sale | 875 | $29.74K |
| Chang Mike F | Gift | 23.75K | — |
| Xue Bing | Sale | 4.92K | $231.49K |
| Chang Mike F | Gift | 30.00K | — |
| Chang Mike F | Gift | 39.78K | — |
| Chang Mike F | Gift | 736.25K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 2.95M
- Days to cover
- 4.96
- % of shares outstanding
- 9.85%
- Average daily volume
- 594.76K
- Change since last report
- +0.8%
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